* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

:root {
  --bg: #f8f8fa;
  --card: #ffffff;
  --card-border: #dddde4;
  --accent: #c89818;
  --accent-dim: rgba(200, 152, 24, 0.1);
  --correct: #1a9a45;
  --wrong: #d03040;
  --left-color: #3070d0;
  --right-color: #d05035;
  --text: #2a2a3e;
  --text-dim: #6b6b80;
  --white: #1a1a2e;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html, body {
  height: 100%; background: var(--bg); color: var(--text);
  font-family: 'Inter', -apple-system, sans-serif; font-size: 18px;
  overflow: hidden;
}

#app {
  max-width: 480px; margin: 0 auto; padding: 20px;
  padding-top: calc(48px + var(--safe-top));
  padding-bottom: calc(20px + var(--safe-bottom));
  height: 100dvh; display: flex; flex-direction: column;
}

.back-link {
  position: fixed; top: 12px; left: 12px; font-size: 13px;
  color: #6b6b80; text-decoration: none; letter-spacing: 1px;
  font-family: sans-serif; z-index: 999; padding: 8px;
}

.hidden { display: none !important; }

/* Title */
#title-screen {
  text-align: center; display: flex; flex-direction: column;
  align-items: center; justify-content: center; flex: 1;
  animation: fadeIn 0.5s ease-out;
}
.title-icon { font-size: 64px; margin-bottom: 12px; }
.game-title { font-size: 52px; font-weight: 900; letter-spacing: 6px; color: var(--accent); }
.tagline { font-size: 14px; letter-spacing: 3px; color: var(--text-dim); margin-top: 8px; }
.rules-box {
  margin: 32px 0; text-align: left; background: var(--card);
  border: 1.5px solid var(--card-border); border-radius: 12px;
  padding: 20px 24px; width: 100%;
}
.rules-box p { font-size: 16px; line-height: 1.8; color: var(--text); }
.hl { color: var(--accent); font-weight: 700; }
.best-score { font-size: 13px; color: var(--text-dim); margin-top: 12px; letter-spacing: 1px; }

.btn-main {
  background: var(--accent); color: #fff; font-family: inherit;
  font-size: 18px; font-weight: 800; letter-spacing: 2px; border: none;
  border-radius: 10px; padding: 0 32px; min-height: 58px; cursor: pointer;
  transition: all 0.15s; text-transform: uppercase; width: 100%; max-width: 340px;
}
.btn-main:active { transform: scale(0.97); opacity: 0.9; }

/* Game Header */
#game-screen {
  display: flex; flex-direction: column; flex: 1;
  animation: fadeIn 0.3s ease-out;
}
.game-header {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px;
}
.score-label { font-size: 28px; font-weight: 900; color: var(--accent); }
.lives-label { font-size: 22px; letter-spacing: 4px; }

/* Timer */
.timer-bar {
  height: 6px; background: var(--card-border); border-radius: 3px;
  margin-bottom: 16px; overflow: hidden;
}
.timer-fill {
  height: 100%; background: var(--accent); border-radius: 3px;
  width: 100%; transition: width linear;
}
.timer-fill.urgent { background: var(--wrong); }

/* Arena */
.arena {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 24px;
}

.choice-row {
  display: flex; gap: 12px; width: 100%;
}

.sort-btn {
  flex: 1; height: 72px; border-radius: 14px; border: 3px solid;
  background: transparent; cursor: pointer; transition: all 0.15s;
  display: flex; align-items: center; justify-content: center;
  padding: 8px 12px;
}
.sort-btn:active { transform: scale(0.95); }

.sort-left {
  border-color: var(--left-color);
  background: rgba(48, 112, 208, 0.06);
}
.sort-left:active { background: rgba(48, 112, 208, 0.2); }

.sort-right {
  border-color: var(--right-color);
  background: rgba(208, 80, 53, 0.06);
}
.sort-right:active { background: rgba(208, 80, 53, 0.2); }

.sort-cat-label {
  font-family: inherit; font-size: 16px; font-weight: 800;
  letter-spacing: 1px; text-transform: uppercase;
}
.sort-left .sort-cat-label { color: var(--left-color); }
.sort-right .sort-cat-label { color: var(--right-color); }

.word-zone {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
}

.category-hint {
  font-size: 12px; letter-spacing: 3px; color: var(--text-dim);
  margin-bottom: 12px; text-transform: uppercase;
}

.word-display {
  font-size: 36px; font-weight: 900; color: var(--white);
  text-align: center; letter-spacing: 2px; min-height: 48px;
  transition: all 0.2s;
}
.word-display.pop-in { animation: popIn 0.3s ease-out; }
.word-display.correct-word { color: var(--correct); }
.word-display.wrong-word { color: var(--wrong); }

.flash-feedback {
  font-size: 16px; font-weight: 700; letter-spacing: 2px;
  min-height: 24px; margin-top: 10px;
}

.streak-label {
  text-align: center; font-size: 13px; color: var(--text-dim);
  letter-spacing: 2px; margin-top: 8px; min-height: 20px;
}

/* Game Over */
#gameover-screen {
  text-align: center; display: flex; flex-direction: column;
  align-items: center; justify-content: center; flex: 1;
  animation: fadeIn 0.5s ease-out;
}
.gameover-heading { font-size: 32px; font-weight: 900; letter-spacing: 4px; color: var(--white); margin-bottom: 16px; }
.final-score { font-size: 64px; font-weight: 900; color: var(--accent); margin-bottom: 8px; }
.final-rank { font-size: 20px; font-weight: 700; color: var(--text); letter-spacing: 2px; margin-bottom: 24px; }
.final-stats { font-size: 15px; color: var(--text-dim); line-height: 2; margin-bottom: 32px; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn { from { transform: scale(0.5); opacity: 0; } to { transform: scale(1); opacity: 1; } }

@media (max-height: 667px) {
  .game-title { font-size: 40px; }
  .word-display { font-size: 28px; }
  .sort-btn { height: 60px; }
  .rules-box { padding: 14px 18px; margin: 20px 0; }
}